168 - 



The yields show this plat not to be the lowest 

 in production, but this is due to the south end being con- 

 siderably better than the north end. 



In conducting tests by this method, where data 

 is secured at short intervals, uniform conditions should 

 be maintained, especially as regards temperature. This 

 is especially important as tiw drought limit is approached 

 for the ihiilbility of the water film is increased as the 

 temperatxire rises thns assisting drainage. The inceease 

 in Column XVI over XV (Table "G") is probably du^ to this 

 cause . 



But where it is desired to get only approximate 

 results, as may be desired when selecting land for plat 

 experiments, it would seem unnecessary to take such 

 painstaking care. The optimvim moisture could be gotten 

 from the soil taken from the field at the proper time, 

 and taking samples in cylinders for drainage and evap- 

 oration according to the method above described. Make 

 weighings of two or more samples till the last fallbe- 

 gins to occur, then weigh all the cylinders and calculate 

 results. It would perhaps be unnecessary to saturate the 

 soil in the cylinders . 



The determination of the moisture capacity of 

 the soil detached from the field would seem to be of 

 value as a reconnoisance method for the selection of land 



